Here is a problem of chemistry from JEE 2015 Paper 1

http://www.fiitjeenoida.com/JEE%20(ADVANCED)-2015-SOLUTION-PAPER-1(PCM).pdf

You can have a look at Q37

It talks about reduction of Ferric ions to ferrous by using Hydrogen peroxide

I Was not able to get the answer to the problem . hence i searched youtube and got a nice practical explanation

https://www.youtube.com/watch?v=Gqtr7Q-GmOY&list=PLtfEipLJrhIG7j3fFcrbMlL2g41nr1uQi&index=19

according to the practical done no choice is correct but unfortunately in official keys answer was Given as AB.

What are your views?

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## Comments

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TopNewest@Aniket Sanghi @Archit Agrawal @aryan goyat @shubham dhull @Prince Loomba

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Yes , maybe the answer key is wrong ! they did'nt consider the practical view point and relieved only on the theoretical view point , BUT , also i have seen in some books earlier giving the answer as AB , so nothing can be done now ,\[\] CONCLUSION : you should read more books !

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Based on what percentage of reagents were used in that video usually in paper rxn with conc H2SO4 means 100% of it but in lab even conc consists ard 50% diluted H2SO4 to prevent 3rd degree burn but its chemistry so can't say confidently.

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But even by theory i found a satisfactory explanation why the answer should be cd Rather

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why not close the discussion then , if your doubt is resolved !

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you may also see his explanation..skip to 19:21 mins ....https://www.youtube.com/watch?v=pOMQOiNhseI @Prakhar Bindal

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